Meeting with severe environmental problems, highly efficient, environmental friendly and multiple reusable catalysts are demanding to develop. In this work, carbon based bimetallic oxides with oxygen vacancies were prepared toward peroxymonosulfate (PMS) activation for 4-aminobenzoic acid ethyl ester (ABEE) degradation. Among different molar ratios of ferrous ions and manganese ion, Fe₁Mn₁-Fe NC appeared optimum catalytic performance. The degradation of ABEE should contain free radical pathway and non-free radical pathway. All of sulfate radical, hydroxyl radical, superoxide radical and singlet oxygen were responsible for efficient degradation and mineralization of ABEE. Lattice oxygen was the main reactive site for ABEE degradation. Electron transport provided good synergistic redox reaction between Fe and Mn and promoted lattice oxygen released. New proposed pathway for ABEE degradation included electrophilic and radical addition, hydrogen abstraction reaction and diazotization. This work is expected to provide rational design of bimetallic materials with oxygen vacancy for in-situ environmental remediation.

面对严重的环境问题，需要开发高效，环境友好和多种可重复使用的催化剂。在这项工作中，制备了具有氧空位的碳基双金属氧化物，用于过氧化一硫酸盐（PMS）活化，以降解4-氨基苯甲酸乙酯（ABEE）。在亚铁离子和锰离子的摩尔比不同的情况下，Fe ₁ Mn ₁-Fe NC表现出最佳的催化性能。ABEE的降解应包含自由基途径和非自由基途径。硫酸根，羟基，超氧根和单线态氧都对ABEE的有效降解和矿化负责。晶格氧是ABEE降解的主要反应部位。电子传输在铁和锰之间提供了良好的协同氧化还原反应，并促进了晶格氧的释放。ABEE降解的新提议途径包括亲电和自由基加成，氢提取反应和重氮化。预期这项工作将为具有原位环境修复的氧空位的双金属材料提供合理的设计。